Q: Temperature rises when park or at red light, but goes down when driving

asked by on

Temperature rises as when parked or at red light, but goes down when driving. Certain days it would randomly jump to the red line as if it is overheating, but its not really overheating. New coolant sensor, water pump, and thermostat(purchased about 3yrs ago new from store but never used, just had it sitting in garage b/c i didn't need it at the time, so idk maybe is it possible that the thermostat may be defective?). Bled coolant system several times with air off, heater temperature all the way up(car heater seems to not blow hot air as supposed to, just warm air). Car rides normally around the neighborhood or locally, but when taking turnpike to work it jumps to overheating after about 15mins into the drive. Lets car cool down to check fluids, coolant still remains to neck of radiator. Bleeds system again and car rides with no problem. No coolant leaks anywhere, radiator good, reservoir flows as supposed. Thanks in advance for taking the time to help

My car has 75000 miles.
My car has an automatic transmission.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Temperature rises when park or at red light, but goes down when driving

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: On full throttle there is a grinding noise under the right hand side of the dashboard

Hi there: In most cases a grinding noise is caused by lack of lubrication or metal-to-metal contact. It's commonly a sign of damage to wheel bearings, or suspension components. The best way to correctly diagnose this issue is to have...

Q: How much offset would I need to fit 16X8 wheels on my 2004 Chevrolet Silverado

Hello. When using a 16X8 wheel on your truck you need to use an offset of 10 mm. This will give you the necessary clearance for the wheel itself. This may not be suitable for the tire that you are...

Q: Car not starting due to security code.

Hi there. This comes up frequently on this vehicle. The two most common problems that I have found that cause this is either a failure in the passlock sensor in the ignition lock cylinder, or the body control module has...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.